1) Guy jumps on ledge 2) Guard throws arrow at Guy 3) Guy catches arrow in midair 4) Guy hits Guard in head with arrow 5) Guy pushes pillar 6) Guy grabs cake and jumps on ledge 7) Guys lands on playform above cake 8) Guy teleportly breeds the cakes 9) Guy gets both cakes
Here's another solution. This only really works if it is your evil twin that's preventing you from reaching the cake. Explanation below the image.
Step one: Call mom. Step two: Mom yells at my brother because he was mean and tried to hurt me. Step three: Mom brought cake. We all eat it together and everybody's happy.
I really don't see why you all have to resort to violence all the time.